Upload one image, enter the target width and height in pixels, choose PNG, JPG, or WebP output, and start resizing. When the process finishes, download the resized image.
Free Image Resizer
Resize one image to exact pixel dimensions and download it as PNG, JPG, or WebP.
What This Image Resizer Does
This image resizer changes the pixel dimensions of a single image. When you upload a file, the tool reads the original width and height, fills those values into the target size fields, and lets you type a new width, height, or both.
| Input | Output | What you control |
|---|---|---|
| JPG, PNG, WebP, GIF, AVIF, BMP, or TIFF image | PNG, JPG, or WebP image | Target width, target height, aspect ratio, output format, and quality |
| Photo | Resized photo | Smaller or larger pixel dimensions for sharing, upload, or layout use |
| PNG image | Resized PNG, JPG, or WebP | Keep PNG output when transparency-friendly output matters |
| JPG image | Resized JPG, PNG, or WebP | Choose JPG for broad photo compatibility |
| Web image | Resized WebP, PNG, or JPG | Choose WebP for modern web workflows that accept it |
The page is intentionally focused on resizing dimensions. It does not batch resize multiple images, crop the image, create social media presets, use AI upscaling, or resize to a fixed KB or MB target. If file size is the main problem, use the Image Compressor. If the visible area needs trimming before you set final dimensions, use the Image Cropper.
How to Resize an Image Online
1
Upload one image
Choose an image from your device or drag it into the upload area. The current uploader accepts JPG, PNG, WebP, GIF, AVIF, BMP, and TIFF images, then prepares the image for browser-based resizing.
2
Set target dimensions in pixels
Enter the width and height you want. The maximum target dimension is 8192 pixels. Use exact values when an upload form asks for a size such as 512 x 512, 72 x 72, or another pixel requirement.
3
Use the aspect ratio lock when needed
Leave the ratio locked when you want the resized image to keep its original proportions. Unlock the ratio only when the final layout requires a different width-to-height relationship, because forcing a new ratio can stretch the image.
4
Choose PNG, JPG, or WebP
PNG is useful for graphics and transparency-friendly workflows. JPG is practical for ordinary photos and wide compatibility. WebP is useful for modern websites when the next system accepts WebP files.
5
Resize and download
Start resizing and download the new file. The downloaded filename includes the target dimensions, which helps you identify the resized copy later.
Resize Image Dimensions and Pixels
The strongest use case for this page is resizing an image by pixels. Instead of estimating with percentages, you type the exact target dimensions that the next app, website, or layout needs.
| Goal | What to enter | Notes |
|---|---|---|
| Resize image to 512 512 | Width 512, height 512 | Unlock the ratio only if a square output is required |
| Use an image resizer 72x72 | Width 72, height 72 | Works as an exact pixel-size example for icons or small previews |
| Make a photo smaller | Enter a lower width or height | Keep the ratio locked to avoid stretching |
| Make an image wider or taller | Enter custom width and height | Check the result because changing ratio can distort the image |
| Prepare a web image | Enter the layout size needed by your page or CMS | Choose WebP only when the destination accepts it |
If you need to resize image pixels without distortion, start by changing only one dimension while the aspect ratio lock is on. The other dimension updates from the original proportions, so faces, logos, products, and screenshots keep their shape.
Output Formats and Quality Settings
This free image resizer accepts several common input formats but exports only practical web formats: PNG, JPG, and WebP. That keeps the workflow simple and predictable.
| Output format | Best for | Quality option |
|---|---|---|
| PNG | Graphics, screenshots, sharp edges, transparency-friendly output | Not shown |
| JPG | Photos, camera images, broad compatibility | Available |
| WebP | Modern web images and smaller delivery copies | Available |
The quality setting appears for JPG and WebP output. Higher quality usually keeps more visual detail and creates a larger file. Lower quality can create a smaller file but may add visible compression artifacts. Quality does not replace pixel resizing: dimensions control width and height, while quality affects JPG/WebP encoding.
Common Uses for an Online Photo Resizer
Resize photos for upload forms
Many forms reject images that are too wide, too tall, or too large for the layout. Resize the photo to the requested pixel dimensions before uploading it.
Prepare website and CMS images
Large camera images can be awkward in website layouts. Use the image resizer online to create a delivery copy with the width and height your page actually needs.
Resize PNG and JPG images
Use this as a resize PNG image workflow when you need a PNG with new dimensions, or as a resize JPG image workflow when a photo needs a smaller or exact pixel size.
Create exact-size copies
When a system asks for a specific dimension such as 512 x 512 or 72 x 72, type those values directly. Keep in mind that exact square sizes may stretch a rectangular source unless you prepare a square source first or accept the changed ratio.
Privacy and Limits
Browser-based resizing
Resizing runs in your browser with the Canvas API. The image is loaded locally for preview and processing, then the resized file is created for download. This makes the page a good fit for ordinary images that you want to resize without installing software.
One image at a time
The current tool handles one image at a time. It does not provide a batch queue, target file-size mode, smart crop, AI enhancement, or social media preset picker. It also should not be used when an animated GIF must stay animated, because the export formats are PNG, JPG, and WebP.
Keep an original copy
For best results, keep an original copy of important images. Resizing creates a new delivery file, and enlarging a small source image cannot add real detail that was not in the original.
Frequently Asked Questions
An image resizer changes the pixel dimensions of an image. This page lets you type exact width and height values, lock the aspect ratio when needed, and export a new image file.
Yes. Upload a JPG, PNG, WebP, GIF, AVIF, BMP, or TIFF photo, choose the target dimensions, and download the resized result as PNG, JPG, or WebP. JPG is usually the most practical output for ordinary photos.
Yes. You can upload a PNG image, set new dimensions, and choose PNG, JPG, or WebP output. Choose PNG output when you want a transparency-friendly format for the resized copy.
Yes. Upload the JPG or JPEG file, enter the target width and height, choose JPG output if you want broad compatibility, and select a quality level before downloading.
Yes. Type 512 for width and 512 for height, or 72 for width and 72 for height. If the source image is not already square, unlock the aspect ratio only if you accept stretching, or prepare a square source before resizing.
Yes. Open the page in a mobile browser, upload a photo from your device, enter the target dimensions, and download the resized file. Check the downloaded result before replacing the original photo.
Reducing image dimensions usually keeps the result clean when the source is sharp. Enlarging a small image can look pixelated because resizing cannot create real detail that was not in the original file. Use the aspect ratio lock to avoid distortion.
You can keep more visual quality by using a strong source image, avoiding unnecessary enlargement, and choosing a higher JPG or WebP quality setting. No image resizer can guarantee lossless visual quality when a small image is enlarged.
Not directly. This page changes width and height in pixels; it does not provide a fixed KB or MB target. If file size is the main goal, use the Image Compressor after choosing the dimensions you need.
No. The current workflow handles one image at a time so you can check the target size, output format, and downloaded result for each file.